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251 | palkovsky | 1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | #include <arch/cpu.h> |
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30 | #include <arch/cpuid.h> |
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31 | #include <arch/pm.h> |
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32 | |||
33 | #include <arch.h> |
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34 | #include <arch/types.h> |
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35 | #include <print.h> |
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36 | #include <typedefs.h> |
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37 | |||
38 | /* |
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39 | * Identification of CPUs. |
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40 | * Contains only non-MP-Specification specific SMP code. |
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41 | */ |
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42 | #define AMD_CPUID_EBX 0x68747541 |
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43 | #define AMD_CPUID_ECX 0x444d4163 |
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44 | #define AMD_CPUID_EDX 0x69746e65 |
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45 | |||
46 | #define INTEL_CPUID_EBX 0x756e6547 |
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47 | #define INTEL_CPUID_ECX 0x6c65746e |
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48 | #define INTEL_CPUID_EDX 0x49656e69 |
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49 | |||
50 | |||
51 | enum vendor { |
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52 | VendorUnknown=0, |
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53 | VendorAMD, |
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54 | VendorIntel |
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55 | }; |
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56 | |||
57 | static char *vendor_str[] = { |
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58 | "Unknown Vendor", |
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59 | "AuthenticAMD", |
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60 | "GenuineIntel" |
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61 | }; |
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62 | |||
63 | void set_TS_flag(void) |
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64 | { |
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65 | asm |
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66 | ( |
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67 | "mov %%cr0,%%rax;" |
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68 | "or $8,%%rax;" |
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69 | "mov %%rax,%%cr0;" |
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70 | : |
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71 | : |
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72 | :"%rax" |
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73 | ); |
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74 | } |
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75 | |||
76 | void reset_TS_flag(void) |
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77 | { |
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78 | asm |
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79 | ( |
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80 | "mov %%cr0,%%rax;" |
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81 | "btc $4,%%rax;" |
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82 | "mov %%rax,%%cr0;" |
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83 | : |
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84 | : |
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85 | :"%rax" |
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86 | ); |
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87 | } |